<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    const a = 0.0000000001;

    function scientificNotationToString(val) {
        val = String(val)
        if (val.indexOf('-') >= 0) {
            val = '0' + String(Number(val) + 1).substring(1);
        }
        return val
    }

    console.log(scientificNotationToString(a));
</script>
</body>
</html>
